import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/Users.vue'
import Rights from './components/power/Rights.vue'
import Roles from './components/power/Roles.vue'
import Cate from './components/goods/Cate.vue'
import Params from './components/goods/Params.vue'
import GoodsList from './components/goods/List.vue'
import Add from './components/goods/Add.vue'
import Order from './components/order/Order.vue'


Vue.use(Router)

 const router = new Router({
  routes: [
    {path: '/', redirect: '/login'},//路由重定向
    {path: '/login',component: Login },
    {
      path: '/home',
      component: Home, 
      redirect:'./welcome',
      children:[
         { path:'/welcome',component:Welcome},
         { path:'/users',component:Users},
         { path:'/rights',component:Rights},
         { path:'/roles',component:Roles},
         { path:'/categories',component:Cate},
         { path:'/params',component:Params},
         { path:'/goods',component:GoodsList},
         { path:'/goods/add',component:Add},
         { path:'/orders',component:Order},]
    }
  ]
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to 将要访问的路径
  //from代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  //  next()放行    next('/login')强制跳转
  if(to.path === '/login') return next();
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router

